I have an 8 year old Embden gander who has been doing a little more resting than normal lately. He's eating and drinking OK but just seems to be a bit off. For several days now I have noticed him resting while his mate stands guard next to him. He has a small amount of dirt collecting at the corner of each eye like he may have had a little discharge that attracted soil. I have lots of different dewormers and antibiotic choices here on the farm but don't really know where to start with these vague symptoms. Any thoughts?