Originally Posted by RunJumpRide
Thank you so much.
After a few hours of searching the interwebz, I've come to suspect that she has worms? I worm her regularly (every 75ish days) with generic wormer - Ivermectin (and occasionally Pyrantel) - at the local feed store, but after some research is seems that some worms are immune to Ivermectin??!! I'm thinking of calling the vet on Monday. It does seem like she has the symptoms: roundish belly, skinnier than normal (like I can feel all her ribs), toilet-brush tail (which - I could just be me being paranoidshe usually has anyway because she gets into burrs alot), tired, uninterested, just overall feeling under the weather.
Just one question: do normal de-wormers cure an infested horse?
Proper worming will get rid of an infestation, but you do need to ROTATE wormers and make sure you are giving the right dosage (if you give a little bit more it won't hurt as much as a little bit LESS - less will help the worms develop resistance to the medicine and can cause a lot of problems in the long haul). You should rotate between Ivermectin, Pyrantel and maybe Fenbendazole or Anthelcide. I usually only do Ivermectin every 1st rotation. I have Pyrantel and then either use Fenbendazole or Anthelcide on the 3rd round. I also make sure to give a tape worm wormer once a year (prazinquantel) which is sold usually in combination with a name brand Ivermectin (like Zymectrin Gold). Every two months is a good schedule as it is easy to remember and you can schedule the worming with your other pets' worming/pesticide applications (provided you have dogs/cats). That always helps me remember.
Though you should be able to feel your pony's ribs a little bit. Ponies are super prone to founder and it's best to have them more trim than you think. Our pony is in the process of losing weight and pony fat is like glue - once it's there, it's STUCK - she lost the first 100 lbs no problem but the last 50 is like fighting seal blubber.
Is it possible your horse has sand in her gut? That can also affect her belly and condition. It's easy to test for sand by putting a few poop nuggets in a bucket and checking back in an hour - if you have sand on the bottom, then you probably need to feed Chia or psyllium for a week to clear the sand out.