We are just going to Heaven to view the judgement and after the 100 years we will come back to eath with the Lord. He makes a new Heaven and a new earth. I believe we will be just as Adam was before the Fall.
The Scriptures says that Christians (only Christians) will be
changed at the first resurrection:
1 Corinthians 15:50-53 (WEB):
(50) Now I say this, brothers, that flesh and blood can’t inherit God’s Kingdom; neither does the perishable inherit imperishable.
(51) Behold, I tell you a mystery. We will not all sleep, but we will all be changed,
(52) in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised incorruptible, and we will be changed.
(53) For this perishable body must become imperishable, and this mortal must put on immortality.
There is no mention in the Scriptures of changed Christians being changed back to being human. Where do you get that idea from?

We will be changed to be like Jesus now is:
1 John 3:2 (WEB):
(2) Beloved, now we are children of God, and it is not yet revealed what we will be. But we know that when he is revealed, we will be like him; for we will see him just as he is.
Romans 8:29-30 (WEB):
(29) For whom he foreknew, he also predestined to be conformed to the image of his Son, that he might be the firstborn among many brothers.
Hebrews 1:3-4 (WEB):
(3) His Son is the radiance of his glory, the very image of his substance, and upholding all things by the word of his power, who, when he had by himself purified us of our sins, sat down on the right hand of the Majesty on high;
(4) having become so much better than the angels, as he has inherited a more excellent name than they have.
Philippians 3:20-21 (WEB):
(20) For our citizenship is in heaven, from where we also wait for a Savior, the Lord Jesus Christ;
(21) who will change the body of our humiliation to be conformed to the body of his glory, according to the working by which he is able even to subject all things to himself.
1 Corinthians 15:53-54 (WEB):
(53) For this perishable body must become imperishable, and this mortal must put on immortality.
(54) But when this perishable body will have become imperishable, and this mortal will have put on immortality, then what is written will happen: “Death is swallowed up in victory.”
How disappointing it would then be if after a 1,000 years of being like Jesus, being made greater than the angels, we are then downgraded to being lower than the angels again, having our immortality changed back to mortality (which by definition is not possible) and the victory snatched away from us. That is not what God is promising us in the Scriptures!
Romans 8:16-17 (WEB):
(16) The Spirit himself testifies with our spirit that we are children of God;
(17) and if children, then heirs; heirs of God, and joint heirs with Christ; if indeed we suffer with him, that we may also be glorified with him.
You shouldn't just say "I believe ..." and then not quote verses of Scipture to support your beliefs - if you believe it then you should be able to support it with verses from the Bible, and if you can't support it with Bible references then you should seek to discover the truth and not try and persuade others to believe your guesses and assumptions.
Y'all can be spirit beings and stay in the old heaven. I am going to come with the Lord to the earth made new. This was His plan.
I'd rather remain a member of the body and bride of Christ and share in his inheritance, which is God's plan. Ephesians 1 (WEB):
(3) Blessed be the God and Father of our Lord Jesus Christ, who has blessed us with every spiritual blessing in the heavenly places in Christ;
(4) even as he chose us in him before the foundation of the world, that we would be holy and without defect before him in love;
(5) having predestined us for adoption as children through Jesus Christ to himself, according to the good pleasure of his desire,
(9) making known to us the mystery of his will, according to his good pleasure which he purposed in him
(10) to an administration of the fullness of the times, to sum up all things in Christ, the things in the heavens, and the things on the earth, in him;
(11) in whom also we were assigned an inheritance, having been foreordained according to the purpose of him who does all things after the counsel of his will;
(12) to the end that we should be to the praise of his glory, we who had before hoped in Christ.
(13) In him you also, having heard the word of the truth, the Good News of your salvation—in whom, having also believed, you were sealed with the promised Holy Spirit,
(14) who is a pledge of our inheritance, to the redemption of God’s own possession, to the praise of his glory.
Isa 66 talks about animals in the new earth.
Does it? Why did you not quote the relevant verse(s)? It mentions at the end of the chapter that God will create a new heavens and a new earth, but I don't see anything in the chapter that describes what the new earth will be like. Regardless, while there will no doubt be animals on the earth, it certainly doesn't say that there will be animals in heaven.
For all of the animals we have loved, who have been constant loving companions, saved us from injuries, stayed by us in sickness..If you dont think they will be given back to us, then that's fine.
It's fine if that is what God's Word to us says. I have not found any verse in the Bible which suggests that animals will be resurrected, nor that some of them will be resurrected as spirit beings and go to heaven. Please share with us some (any) verses that says that if you know of any.