Should I pay my boyfriend for watching my pups while I was on vacation?

My boyfriend asked me to pay him money for everyday he took care of my pups. Is this wrong of him to ask me? I have done so many things for him and never once asked him to pay me for it but he was like if you could pay me that would be great but he was already in town to go to the gym and to work and my house is like 5 minutes away from his job and the gym he uses. It felt weird he asked me to pay him and I questioned it a bit because I have watched his dog before for him and never asked him to pay me for it but he said I needed to pay him for gas. I only asked him to feed my fish and dogs and it was for 2 days. One feeding in morning and night before and after work. I do have 5 cats but they tend to themselves and didn’t need to be taken care of since they are free fed with a gravity bowl and always have clean water that is filtered. But he wanted me to pay him $25 bucks for gas. I gave him the money but is this a normal thing in a relationship or kinda weird?

Should I pay my boyfriend for watching my pups while I was on vacation?
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