Ok second suggestion and question: what about the peppermint/clove lavender oil thing. Apparently if you spray it around the aviaries it deters mice as they do not like the smell, although i have read mice dont like any new smells. If it is pure peppermint oil which i think is the main smell they dont like you only ned do it once a month.
I realise mice can be smart and all these things may not work 100% but hey if it deters 80 % of mice that is a success in my books.
The last thing i would like to add is that i have been reading about these sonic sonar electrical devices witht he high frequency sound that deter mice- yes they may work initially but they do not work in the long term as mice will get used to the high pitched noise-or so i am told...so anyone out there with longterm success i would love to hear about it-not short term.
Ok thats my input-try to to jump on me the first day if i hav said anything to offend anyone...

isabella