I wonder if it could have been an insect bite? My Minpin had a couple red marks on her tummy recently, and the vet thought that it could have been from possibly ants. She had been laying on the grass previously, and it seems we have alot of ants around. Keep an eye on them, if they don't look better soon or seem to spread etc, take her in to get it looked at.
“The greatness of a nation and its moral progress can be judged by the way its animals are treated” Mahatma Gandhi
My loyal menagerie... (all neutered, spayed, and gelded...and YOU aren't safe either!)
Emmy (Miniature Pinscher)
Petie (Miniature Pinscher)
Shadow (Miniature Pinscher)
Tito (Paint Gelding)
Francesca (Miniature Horse Filly)
Vincenzo (APHA gelding)
Lots of fishies......