My RB Killer(Chihuahua) broke out in a rash like that and we figured out it was from her lying in the grass. I didn't let her go in the grass for awhile and it cleared up. There may have been some fertilizer residue or something chemical still on the grass. With all the given circumstances, this may not make any sense at all Amber but it's a thought I had. With this heat we're having, I think lots more rashes and unusual breakouts, bites. etc. etc. will be the norm until summer is over. I hope Sadie gets better soon. Keep us posted