Is there any cheats for dogz 5?

Yes there is cheats for dogz 5. Here are some:

To see if your do is in love w/ another one, do this. While one of them is sleeping, pick up the other dog that you want them to be in love w/ and if they love each other the sleeping dog should wake up.

If you are waiting for your dog to have puppies, do this. Make sure your dogs are adults and make them fall in love. Exit out of Dogz 5 and then go down to your clock on your computer and set it maybe 1 week later. Then open up dogs again and your dog should be in the nursery.

And that CLEARLY shows you that there are cheats for dogz 5.