Hi Tracy,
The neck you are describing is very typical of lammis... the pony that lives next door to Vics has this and it literally goes up and down depending on the grass... in the week it was awful, hard , lumpy, rigid lumps, today after being kept off the grass for 3 days its much better. It is odd as Lucy never, ever had a crest, where as Vickys comes up very quickly.... its a sure sign of lammi. Its a very good 'indicator' to what the grass is up to... if that helps!
Vickys is doing well, shes now got the hang of her muzzle so is a very happy girl! still has warm feet and a hard, but not prominent crest...BUT had an awful weekend as my lovely bigmare, Dolly came down with colic

I don't think we'll ever know what went wrong there as shes as solid as a rock. Poor girly has been quite poorly and its been extremely stressful and upsetting. Fingers crossed, shes on the up.
Great to see so many other people posting, I know how awful it is, but as a group we have the most amazing support network, and we can all help each other. It has made me see after Lucy, that no 2 lammi cases are the same, every pony/horse shows it in different ways.
Hope all hoofs are safe and as well as can be D x