^ I disagree, I'd say Apple is the lowest demand pet on the main Rares List. I always see people advising against trades for it in the Fair Trade threads due to its unpopularity, and I never saw it as a popular pet.
UR Mint also has poor demand, but I think its high price (due to rarity) is partly to blame for that. I think people like it, but not enough to pay so heavily for it. Apple however, is low on the list so price is not an issue for it. Overall it's just an unwanted pet, it's not a pretty pet and it's not cute like the July Rats. I have seen lots of people trying to get rid of their apples in the past year or so. The only thing really going for Apple is that you can cover it entirely in items, like the Malk Smiley, so you can turn a plushie into a "pet" using it.
I think Cellar x Elijah has a point in that we are putting unwanted pets on the main list such as UR Apple, and not putting July 08 rats which have slightly more demand, and likely have less supply (Pawprint rats, and the Speckles are very low in the list for July-born OMGSRs). I don't think anyone foresaw the Speckles going OMGSR so early. They were going around balloon dog level before their surprise rarity change, so I can see an argument to boost them up the list. They are really clinging to VR this year though, which is interesting. As to the Pawprint rats, it is only a guess that they are less in supply than Apples. I see much less around, but I don't really know how they are going so this might not be correct.
I think they will go OMGSR next year or the year after, but that is just a guess. If they do, they will need to be boosted to the main list and quite a few spots up it, which will be a huge jump for them. Which means that they are incredibly poorly placed right now, if this is the case. That said, it is just as likely that they sit at VR for a long time like the common outcome July dogs, which would mean they are not so poorly placed. But I am fairly sure that they will go OMGSR before many of the July dogs, I think it will take quite a while though. The single-outcome July rats, I'm not so sure about. I don't see them around at all, but I haven't been looking for them. I would've thought them more common than the multiple outcome rats, based on the Speckles going OMGSR first.