Goitre/Goiter swollen thyroid gland

[irishdraft]

has anyone had experience of this in their horse ? I have a 3 year old who seems to have a slightly swollen thyroid gland. he has just been backed and now lightly hacked and seems completly healthy but I have noticed he has a little dry cough when going into trot and wondered whether it was connected. He is at grass with no extra feed

 

[kittyandnewt]

my 6yo jumps off grass every summer and every summer gets a little grass cough as a result, has a couple of coughs in first 10mins of work and gets over it then. does this every day while out. also, on a couple of occasions i have noticed youngsters getting little cold for day or two just after being backed, maybe a little run down after the backing, etc. mine get over it in day or so.