I am betting on raccoon then for the culprit. You might try dogsafe paw traps if legal to use those in your state.
cat food is a good bait dry stuff not the wet.
I think dog too, but it could have been a dawn time raid. Location would be helpful please edit that into your profile under the account button up top. You have green grass so you must be in north texas(I have forgotten how seasons work where I live we usually have hot or cool) or along the gulf...