Why do dogs eat grass?

Amazingly nobody really knows for sure. Grass contains mostly water, but in addition also contains carbohydrates and has low quantities of other nutrients like protein, amino acids, vitamins etc...

After spending many hours searching the internet, and also asking this same question in a number of dog owner groups (online). I have compiled a short list of possible reasons for dogs eating grass. The list is in no specific order of probability.

Dogs & Ticks

It has been widely reported that tick numbers are on the increase here in the UK. They are benefiting from climate change, which posses a real threat to both human and animal health.
 
The apparent changes in seasons are also favouring the spread of ticks that were previously only found in warmer climates. As well as being unpleasant for you and your dog, they can also transmit diseases.