He [32M] Watching my [32F] dog for me.

I went away for 7 days on a family trip out of state and the guy I've been seeing for a year is watching my dog. Our dogs get along great and we go on walks with them frequently. While he was watching my dog he joked that I'm not paying him. (Paying him for a big project that I would pay someone else for has come up on the past for other things). Out of being annoyed I paid what he asked. He said he googled what it would be and did a bit less but asked for $350. I also dropped off 3 new toys for the dogs and 2 large bags of treats when I dropped off my dog along with his regular food, so there aren't any expenses he's paying. Would this be considered a fair price?