help please! regurgitated/ spit out food

[jossh27]

i just fed my calking two adult mice. shes been on two mice bi weekely for as long as i have had her and quite a time before i got her. she took the first mouse no problem and the second was 2/3rds down then she regurged or spit it out... now shes trying to eat it again. the first mouse remained in her stomach. from what i can tell (i didnt weigh the mice) they were the same size.

her husbandry is fine and she just had a really good shed so im really not sure why she would regurgitate it and the try to eat it again if it is indeed to big?!?!