That's really interesting information. I'm not even brave enough to sell snails by post! I am really wary in case they get there DOA.
Todays update is-I have put the blonde female in the trap. She went crazy last night and was still crazy this morning, she has been chasing the babies everywhere and she killed one of the smaller ones

She kept chasing it and nipping it and it just fell to the sand. It was really small

she has been chasing the adults and nipping them too, even the cories. I really don't know what's gotten into her. Any ideas?
For everyones safety i've put her in the trap. She seems calm in there just swimming around but she can only be in there for so long, I don't know what else to do. Unless I put the fry in there and let her out-but she still attacks the cories and the other adults. Really stuck on what to do and why she is acting this way