"That's it" is not enough. Is there a written contract? When did you buy the cat? When did you get it vetted? Where is the seller?

The time to have checked for a license was prior to signing the contract. Now you need to retain counsel versed in contract/construction law....

"My contractor has failed four inspections..." Then it seems he is incapable of competently performing the work contracted for. Proceed...

" It’s been 5 years and I want my dog back..." The time to have acted was half a decade ago. You don't even know if the dog is still...

You would need to file a replevin action against them.

It would seem the breeder has failed to fulfill her obligations upon notice of intent to return. The dog needs training. A shelter MAY take the...

I would also suggest they are liable for the costs of reinstalling the fence they had no right to remove, as well as the repair of any damage.

Do you have a written contract for the purchase of the home? If not, you have a problem under the statute of frauds.

If the cat is not being cared for, a call to animal control may be in order.

Moving to privacy, where this belongs. Discuss with counsel versed in CA privacy law.