If you are concerned about cruelty to animals, you should no longer be eating commercial dairy or eggs. People think that because they don't kill the animal directly for these products, that they must be o.k. for animals, but that is not the case, given the ways they are produced.
Dairy: every calf is removed from his or her mother on the day of or within days of birth on a commercial dairy farm, so that humans can take the milk. This is so even on the "organic" and "free range" farms. The girls replace their mothers, the boys typically are made into veal or cheap meat, as there is no use for them on a dairy farm. If allowed to, a cow can live to about 25 years naturally; on a commercial farm a cow might live 3-4 years (or on a "good" farm 10 years at the very best) - she is so spent from the yearly forced preganancies and births, and no longer useful to the farmer. Gestation is 9 months so a cow is forced to be pregnant with one calf and giving milk from the previous one at the same time, in an endless cycle. Up to 80% of hamburger meat is made up of spent dairy cows.
The cruelest thing about dairy is the separation of mother from calf. This must happen by force, the calf literally being dragged away from the mother. The mother and calf may look for each other and cry for each other for months. The same hormones that bond a human mother to her baby are present in the mother cow, and the same drive to nurture and care for her baby. Ethically it's rather indefensible to consume dairy, especially as there are many other options for calcium and protein in the US.http://www.factoryfarming.org/dairy.htm
Eggs: the vast majority of eggs are from battery farmed hens. They are kept in cages so cramped they can't even spread their wings. They receive no individual care in a system in which vast numbers of animals are farmed in order to maximize profits, it's about volume.
Countless investigations have shown hens with their heads caught in the bars of their cages (so they die of thirst and hunger), or hens who have fallen into the manure pits below, to again die of thirst and starvation. Or animals will have open sores and infections. At the end of their miserable lives they are trucked to a slaughterhouse, handled in an assembly-line process (particularly horrendous because at this point their bones are calcium-depleted, fragile, and easily broken), and killed, usually to become cheap meat/animal feed.http://www.factoryfarming.org/eggs.htm
So-called "free range" may be no better. See: http://www.cok.net/lit/freerange.php
Even when people purchase their own hens in order to get the eggs (and assuming they don't kill them but keep them for life), the problem is that hens are sexed after birth. For every hen purchased, there is a male chick who was tossed in a grinder, the trash, or suffocated.