Hi Conker and welcome to The Squirrel Board! Thank you for your care and love of this Squirrel! What is your Squirrel's name? What species of Squirrel do you have? What does your Squirrel weigh? For dosing medication and supplemental Calcium, an accurate weight obtained from a digital scale expressed in grams is essential!
Seizures are very frightening and are very serious! Why do you suspect that he had a head injury when you took him in? A head injury could certainly lead to seizures but there are other potential causes and one of the most common and most likely to occur in a captive (pet) Squirrel is Metabolic Bone Disease (MBD)! MBD is far more than a bone problem; it is
severe nutritional disorder and assuming that your Squirrel's seizures are a result of MBD; it now an Emergency! MBD is an overall deficiency in Calcium and the bones which normally contain over 99% of an animal's Calcium are "robbed" of calcium and fractures can more easily occur. Calcium is also used by cells everywhere in the body and loss of appetite, weakness or paralysis or seizures are common signs of MBD! MBD results from insufficient Calcium, excessive Phosphorus or what usually in the case; elements of both!
It is also necessary to discontinue feeding all nuts, fruits and treats (yes, for a Captive Squirrel; nuts and fruits are treats and their use can easily lead to development of MBD!
Would you please describe the seizures in detail and their duration? Does it seem that the entire Squirrel is shaking or certain parts or what exactly seems to be going on. Does the Squirrel seem to able to interact with you or during the "seizure" or does he appear unaware of what is going on. Dose he defecate and/or urinate while he is having a seizure?
If this is generalized (involving most or all of the body and involving both sides) your Squirrel will lose all protective reflexes and must NOT be given anything to eat or drink during the seizure as aspiration (food or fluids entering the lungs) is very likely to occur!
Yes, there certainly is a possibility of your Squirrel having sustained ahead injury that lead to seizures or your Squirrel may have another form of seizure disorder that might be considered epilepsy BUT these will require treatment with anticonvulsant medications. Despite what you may have read; there are NO over-the-counter anticonvulsant medication and there are NO so-called natural anticonvulsant medications although there are some supplements that might be useful in conjunction with a true pharmacologic treatment regimen. Although it is far more unlikely to be able to find a friend or family member who has anticonvulsant medication available; it would be worth talking to friends or family about this BUT you must be very careful because if the "wrong" person hears about your Squirrel, you may be reported to authorities!
Again, the probabilities are far in favor of MBD! I have pasted a link to a page on Henry's Pets website that provides very concise information about MBD. Please read this short page now!
https://www.henryspets.com/what-is-m...-bone-disease/
Here is a link to another page on Henry's Website that describes an Emergency Treatment for MBD and I would strongly recommend that you begin this treatment IMMEDIATELY!
https://henryspets.com/emergency-treatment-for-mbd/
The Treatment for MBD is harmless if later it is determined that your Squirrel did not have MBD but it can literally be life saving if your Squirrel does have MBD!
It is good that you have Henry's Healthy Blocks (HHBs) as these are highly concentrated nutritional sources and will be an excellent maintenance source of Calcium! Your Squirrel will also need a Supplemental (extra) source of Calcium to begin replenishing lost Calcium! Henry's recommends utilizing Tums (calcium carbonate tablets) as an immediate supplement of Calcium. In the USA, Calcium carbonate tablets do NOT have Vitamin D. I do not know about those in Canada but it it important that the Calcium Carbonate Tablets do NOT contain Vitamin D! These tablets should be pure calcium carbonate and should NOT contain other minerals, vitamins or other "stuff!"
Please post a photo of the label of the Tums or Calcium Carbonate Tablets that you have or obtain as it can be confusing because sometimes the calcium content is expressed in elemental calcium and sometimes as calcium carbonate. To illustrate the issue; Calcium Carbonate contains only 40% elemental calcium!
I apologize for you not receiving a response until now! I wish the best for your Squirrel and for you! Please provide updates!
Regards,
Samthe


