personally i'm against wet food unless the dog has a problem chewing it. why, well.
1. wet foods TEND to be alot more fattening then dry (not always but usually)
2. No good for teeth, tar tar builds up alot faster.
2.
the chewing of the dry food/bones etc. help keep their teeth cleaner and healthier, teeth for dogs is very important dogs with teeth issues can get infections which can lead to many complications including sepsis and eventually death (not to sound overly dramatic, just saying)
3.wet is expensive to feed daily, that being said that same amount of money can be used to a great quality dry food that is healthier as a whole.
4. fat dogs=no good healthwise.
anyway just my two cents. If you want to treat i'd just doo as jassy mentioned yogurt, pumpkin veggies etc etc. added to their food, we also like to make his dog food slightly more intresting but processed wet food isn't personally to my liking.
good luck