The purpose of kindergarten is to prepare children for a classroom environment, including interpersonal skills. If you think a border collie is capable of that, I've got a talking horse to sell you.
We know that cats, dogs, and a few other types of animals can be infected with SARS-CoV-2
Many of us live in rental accomodation that have no-pets rules.
Good point, but many people are making changes due to a radically different lifestyle. Moving to new places to find work, moving out of cities for more space and lower rent/cheaper house. It's not reasonable to expect you get through this without making lifestyle changes.