We can switch her to frozen thawed if your willing to go the extra mile. You need to avoid pine based substrate and NEVER use cedar. Cedar will eventually kill your snake. She should NOT be on mice at all at this age and size. Quite frankly, most 1-1.5 month old boas should be starting on rat pups. At 8 months, my boas were on either weaned or small rats. At 14 months, they are on medium. You could probably do fine with a bag of pups and a bag of weaned (from
www.rodentpro.com) to get her back on the right track.