are we allowed to work for other companies as well as Rover?

I work part time for a local pet sitting company as well as my own business with Rover. The only stipulation they have is that you not poach clients from the other company - i.e. don't move a Rover client to the other company and vice versa. I don't know if Wag has that stipulation for walking clients.

Many Rover sitters and walkers also work for Wag. Many of us also run private pet care businesses alongside our Rover business, that's the benefit of being an IC we can do what we prefer.

Yes, you are an independent contractor and can work for whomever you like,