One thing I can use our current data to determine, is the rarities of July dogs to each other, and August dogs to each other etc.
Using the following methodology:
1. List the values of each July dog, grouped by litter
2. Calculate total amount of dogs adopted per litter
3. Weight the values so that I am looking at an equal amount of adopted dogs for each litter (400 per litter outcome)
4. Compare the weighted values for all July dogs
5. Use Chitests to determine equality
I attempted weighting by total litter amount first, but that gave me an incorrect list where Sunback was below Nonswirl and Nontag, which we know it isn't due to it being OMGSR very briefly. Using the new methodology I came up with the following list. On both attempts the Moonswirl always ended up the same value as the Dogtag.
Proposed July Dog Rarity Tiers wrote:1 Sunjewel
2 July PPS Moonswirl Dogtag
3 Coontail
4 Sunback Noncoon Nonjewel Nonswirl Nontag
5 GWJ
Compared to Rarity Change Data:
- Sunjewel went OMGSR in Jan 2012 which is a fair distance from the other pets, suggesting it is correct to place on the top of the list.
- Moonswirl, Dogtag & July PPS went OMGSR one month after each other (April, May, June 2012). This suggests their rarity is very close, so it is ok to put them on the same tier.
- Coontail went OMGSR in July 2013 based on rarity change discussion (not on the list itself), and has dropped down to VR. This suggests it is correct to place next in the list.
- Sunback went OMGSR briefly and the nons went with it so this suggests they are equal rarity)
- GWJ has never been OMGSR so this suggests it is correct to place it at the bottom of the list.
Whether this can be used on the dogs released in the middle of July/August, I am not confident.