Bird Health Questions? Ask an Avian Vet for Answers ASAP
The signs you are describing may go with a number of generalized problems such as:
At this point your best option is to have him examined by an avian vet. Try www.aav.org/vet-lookup, or http://poultrykeeper.com/poultry-vets-uk/poultry-veterinary-practices-services-uk/.
Until your appointment, please isolate in a safe, well-enclosed small area to limit his exercise, with his favorite foods and water made easily available.
There are no safe or effective OTC products to use.
I hope this helps and answers your question. If you are satisfied with this answer, please press the green ACCEPT icon. If you have more questions about this problem, please press 'reply'. Bonuses and feedback are always appreciated. Thank-you.