Madam my guess is two.
Today was a peculiar day. First I found blood on one of the new Midget hens. One of the toms claws needs to be trimmed. She was torn open from her wing down to a deeper cut into hey thigh. Sigh. This is why I prefer to free range. They wear their beaks and claws down so I never have to go through the pain of trying to trim them. Well we got the poor girl cleaned and sprayed. I opted to cover her with one of my sons tshirts. After cutting holes for her legs and cutting the back so I could tie it she was put back with her pals. I've seen this with my BBWs in the fall. The boys are just too heavy, but with the Midgets I had never had a problem. These guys are still in the greenhouse, so they won't wear those claws down. I'll need to do some trimming. They have been raised in confinement.
Then this afternoon when we went down to the chickens and found one of our hens in a fight with an opossum. Silver is pretty tore up, but she had a heavy jean dress on and I think it saved her life. She was pretty naked and the roosters were cutting her, so we made her a dress from a leg of one of my sons outgrown jeans. She only has one wing which makes mating difficult. She's not kept for breeding. Anyway now she is missing most of the skin off her neck. The poor girl. I brought her up cleaned her and treated her wounds. Dern possum bite her quite a few times with those alligator teeth. I'm keeping Silver up at the house until her wounds are well on their way to mended. What a weird day it was. I'm sure both girls will do fine. I've seen much worse, but two in one day was exhausting. Guess I don't normally see possums out and about at midday, so weird it is.
Goodness, you were in first response mode today. I hope your girls recover quickly!