ferret vomiting

we are back at the er with them again, this is draining me mentally please help, the vets can’t figure out what’s wrong with her.

i got rice and spice on 1/22

rice came sneezing and we were told it was the flu, she got better with the sneezing around 2/8

rice vomited on 2/13and 2/14, many tests later we were told she was fine and to just give them probiotics and monitor

spice began having

mucusy watery diarrhea on 2/20

rice vomited on 2/25 and started sneezing again

we are doing all we can for them, daily probiotics, constant vet visits and ed visits for fluids . we have not changed their food at all, they have no other symptoms

they are both 13 weeks old.