That is actually a very good question.
I think pastors and parents have long told their kids that their pet is going to heaven as a way to comfort them.
I can not think of any mention in the Bible of animals going to heaven. However, there are numerous verses that say the only way to get to heaven is through Jesus and that we are given a choice. This does not apply to animals, unless you believe that animals have choice and can make conscious decisions.
Any church that tells you what you can and can't do to get into heaven is wrong according to the Bible. You don't have to pray constantly, you don't have to tithe, and you don't have to worship. Don't worry about all that. It's simple. Jesus summed up the whole Bible for us in a few words.
Matt 22:36-40
36"Teacher, which is the greatest commandment in the Law?" 37Jesus replied: " 'Love the Lord your God with all your heart and with all your soul and with all your mind.' 38This is the first and greatest commandment. 39And the second is like it: 'Love your neighbor as yourself.'[c] 40All the Law and the Prophets hang on these two commandments."
It doesn't matter if you go to church or how often you pray. All that matters is that you believe in God, love God, and love one another. If you do, then everything else will fall into place. Worshipping and praying does not make you a Christian, but if you are a Christian you will want to worship and pray. Think of it more like a relationship. Praying is a way of talking and getting to know God. If you have a relationship with anyone then you will talk with them to learn more about them. Chances are your relationship with anyone wouldn't go anywhere if you never talked with them.
I also think worshipping is often misinterpreted. When God says to worship him, we'll think he means for us to lay on the floor and place our hands up and down and constantly say oh, praise God! I'm sorry, but I'm not doing that, and I don't think God expects us to. By worshipping he means to bring glory to his name. We can bring glory to his name by following our dreams, chasing our goals, and doing the best at the gifts he gave us.
If you love skiing, then go skiing. Have fun doing it, and tell him thanks for giving you the ability to. That's worship. That's it.
Believe in what you want. Believe in God, Believe there is no God, or believe in the force. But just make sure you believe in something! It is complete bullshit to think it doesn't matter if you believe in something or not. If you believe in nothing, then I can guarantee you will accomplish nothing in your life. Everyone who has done anything great in their life has done so because they believed strongly in something or another.