Penelope's move being cancelled due to Silas's death does raise questions about the death. Toronto was on the verge of transferring her. The last guaranteed day to to see her was at the start of the month. They had to be super close. And its not like she cannot breed with literally any male in the US so you would think getting her down there would be more important than knowing who she will breed with. Houston wanted a breeding pair and without Silas its not like they were suddenly short on space. Makes one wonder if Silas died of something that might be passed to Penelope if she had to be held in the same space too soon. Really is a shame because not only will it prevent Toronto from breeding but it also means they are right back at the start and will have to do all the paperwork, health checks, and transport arrangements again. She's going nowhere at this point until spring at the earliest.