Thanks, Polly!
YES! that did work for me this year and only accidentally did I plant tulips among daffodils. They were the only tulips that survived in the backyard out of 250.
After that loss we discovered the vole problem. I think the baits have worked, as we have had to refill a few times. We were told it usually takes 6 weeks to clear them out....until their cousins come in from other areas~!!! LOL