If am currently self employed in equine therapy (mental health based) can these be deductions/loss?.

I have been utilizing my horse solely in my practice (not for personal use).  Due to medical issues I had to put her down in October, so this took a toll on my business.  I have since purchased a new horse for the sole purpose of work.  My question is, can I deduct the vet bills/euthanasia/disposal fees as a loss?  And the purchase of the new horse as a deduction as well?