Hi,I'm Sorry to hear about your pony's problems. Can you tell me if you are giving any medicines for the laminitis now? Also have you seen any blood in her urine? ANd lastly How long has she been feeling lethargic and does she eat and drink. I will check later this afternoon to see your reply and to give you some ideas.
I will give youu some ideas ingeneral now, Laminitis can be hard to prevent if she has had earlier bouts of laminitis that have permanently damaged the feet. The only way to manage the condition is to keep the hooves trimmed and if she seems sore I have had clients give oral phenylbutazone paste as per label directions for up to 5 days in a row to help when a horse has a flare up of laminitis, Typically grain can cause a flare up so I have clients feed a low grain diet and feed grass hay rather than alfalfa to keep the diet less "hot" meaning full of energy. THis is assuming that she is on good body condition and not thin. If she is thin she may need grain for other reasons, but if she is in good shape reducing the grain may be enough.
THe frequent urination may be due to a bladder infection that can but doesn't have to causeblood in the urine. THe only way t know for sure is to catch a urine sample in a cup or bowl and tale a few tablespoons to your vet to have it checked out. If she has a urinary tract infection ( bladder infection or UTI) this will show up on the tests and she will likely need antibiotics.
THe lethargy may be due to the pssibility of a UTI or another general infection somewhere that may be causing a fever. I have had cleints take the temp using a human rectal thermometer. iit shoue be between 101-102 F If you feel comfortable you cold try this. THe fastest way to get her feeling better wold be to have a vet come out to examine her , check her temperature and try to collect a urine sample to check for UTI. If you can find a vet f that is open on the weekend that would be best so she is not hurting for 3 more days. If you can find someone to come out, it would help if oyu could have a urine sample for them so if you can get a vet out, go ahead and catch a sample if possible,. Another option if a vet can't come out, see if oyu can find one that is open so you can take a urine sample to him today. I hope this has helped. I will check later to see how things are going and if you hd a chance to get a vet to examine her. Thanks for your question and good luck.