
Oh that sounds so so sore! All I can suggest is almost constant massage with warm towels and some peppermint ointment that is used on cows - can't remember what they call it - maybe something like 'uddermint'. Try to get as much of the yukky congestion out as possible through the teat orifices, and keep up the antibiotic as your vet's recommendation.
I imagine she''s got to much infection to even think of offering her as a 'wet nurse' to someone with a large litter?
Jo and the Casblaidd Flatcoats