Rabbits cannot not be vaccinated until they have reached two months of age.
According to Madrid College of Veterinarians' guidelines, it is recommended that both vaccines against myxomatosis and hemorrhagic fever are spaced out over two weeks, rather than having them done together.
Once the rabbit has received two vaccines (hemorrhagic fever and myxomatosis) it should be re-vaccinated annually in the case of hemorrhagic virus

No vaccine is currently available for mice.

Autogenous bacterins are recommended to protect guinea pigs against pneumonia due to Bordetella bronchiseptica.
The substantial antigenic cross-reactivity among Bordetella suggests that immunity resulting from use of these vaccines might protect guinea pigs.
The porcine vaccines appeared to afford protection against acute pulmonary disease in the guinea pig.

Core vaccines are vaccines that every single horse should receive, every year.
Risk-based vaccines are vaccines that you may or may not administer to your horse, depending on a variety of factors

Fish can be immunized by immersion in vaccine for a short period of time--30 seconds to 2 minutes.
They can be immunized by injection, intramuscularly or intraperitoneally, and orally by mixing vaccines with feed either by top dressing or by incorporating into feed as an ingredient.
The response to vaccine depends largely on the water temperature, the higher the water temperature, the faster the immune response of fish to the vaccine.