Chia Seeds

Gluten-free, rich in omega-3, packed full of vitamins and minerals and high in fibre, chia seeds have a lot going for them.
Possible Indications and Benefits;
Excellent as a general nutritional supplement to ensure good levels of nutrients such as B vitamins, thiamin, niacin, calcium, magnesium, zinc etc. 
They have anti-inflammatory and anti-oxidant properties containing Omega 3 and 6 fatty acids in approximately a 3:1 ratio. 
It like Psyllium, has a high fibre content and soaks up 10 times its own weight in water and so may help with constipation and anal gland impaction but do not give more than the recommended amounts and avoid in dehydrated pets. 
Suggested Feeding amounts:
Cats - 1/4 teaspoon
Dogs - 1/2-2 teaspoon depending on size
Under 10kgs 1/4 - 1/2 teaspoon
10-20kg 1/2 to 1 teaspoon 
20- 40kg 1 to 1 1/2 teaspoons
50kg plus 1 1/2 to 2 teaspoons