Our cows feed mostly on grass silage — that is, cut grass that has undergone fermentation, which preserves it through the colder months and is more easily digestible. We mix grain with concentrate pellets, which give the cows extra energy to support milk production. Everything is measured precisely, because we study the impact of various dietary modifications on the cows’ health and methane production.
For example, we currently have one group on a diet of 38%-concentrate feed and another on a 50%-concentrate diet. We collect and measure methane in the cows’ breath, and we also take blood, milk and manure samples to compare the dietary outcomes, such as whether the cows in the second group use that extra energy in milk production or whether it turns to body fat.
Ayrshires are small-to-medium-sized cows: their milk yields are not as high as those of larger cows, such as Holsteins, but the milk they produce is good quality and high in fat and protein. They’re very affectionate animals and fun co-workers, too. Each has its own unique personality, and I know them all by name.
We have a milking robot that operates 24/7. This means the cows have free rein to be milked, or to sleep, eat or go outside, whenever they want — it’s a nice life for them.
