The new pets released in the Market this year are already in the Pets Guide. :) Spring show pony, jackalope, etc are in their respective chapters.
If you are referring to the Event Pets for 2019, then no, I did not add them. Great job on noticing this! :D I'm not sure but it looks it's under utilised by the community so I didn't add them.
In fact, I'm not sure if the community is using the Farm 2 Guides... Well there's no feedback and I hardly see posts on them or referring to them so if the guides are not needed, then I will need to consider the option of discontinuing the updates. Seems like it's a waste of time to maintain these guides if no one is using them. Anyways you can see it's mainly me talking (to myself lol) in this thread and with princesskykennedy's generous help in train orders list....
Hmmmm I sometimes wonder if anyone reads this thread lol.