Feed apparatus and system

1. A feed system for delivering liquid feed to animals comprising:

a feed apparatus, comprising:

a plurality of liquid feed sources, wherein one of the liquid feed sources comprises a milk vessel, and another of the liquid feed sources comprises a milk replacer system;

a plurality of common supply lines, each connected to one of the liquid feed sources;

wherein the milk replacer system comprises:

a mixing vessel in which the milk replacer is mixed; and

a distribution vessel which receives mixed milk replacer from the mixing vessel, and is connected to the common supply line associated with the milk replacer system, and

a holding vessel into which milk replacer is controllably diverted from the common supply line associated with the milk replacer system; and

a plurality of animal feeding stalls, each having a fluid connection to each of the common supply lines, wherein the fluid connections are spaced apart along the common supply lines.

2. A feed system as claimed in claim 1 , comprising a controller configured to control delivery of liquid feed from each of the liquid feed sources to one of the animal feeding stalls to provide an individual feed ration.

3. A feed system as claimed in claim 2 , wherein the controller is configured to deliver the individual feed ration in portions.

4. A feed system as claimed in claim 2 , comprising an animal identification device, wherein the controller is configured to determine the individual feed ration for an animal identified while seeking to receive feed at the stall.

5. A feed system as claimed in claim 1 , wherein each of the common supply lines is connected to a respective one of the liquid feed sources in a closed loop.

6. A feed system as claimed in claim 5 , comprising a supply line isolation valve positioned between the last animal feed stall along the common supply line and the liquid feed source.

7. A method of delivering liquid feed to a plurality of animal feeding stalls comprising:

controlling delivery of a first liquid feed and a second liquid feed via respective common supply lines to at least one of a plurality of animal feeding stalls, each of the animal feeding stalls having a fluid connection to each of the common supply lines, wherein the fluid connections are spaced apart along the common supply lines,

wherein the first liquid feed is milk replacer, and the method comprises:

mixing the milk replacer in a mixing vessel; and

delivering the milk replacer to a distribution vessel from the mixing vessel, for delivery to the animal feeding stall via the common supply line configured to deliver the milk replacer; and

diverting the milk replacer to a holding vessel during washing of the distribution vessel.

8. A method as claimed in claim 7 , comprising controlling delivery of the first liquid feed and the second liquid feed to one of the animal feeding stalls to provide an individual feed ration.

9. A method as claimed in claim 8 , comprising providing the individual feed ration in portions.

10. A method as claimed in claim 8 , comprising identifying an animal seeking to receive feed at the stall, and determining the individual feed ration based on the identification.

11. A method as claimed in claim 7 , comprising cycling unused liquid feed back to a liquid feed source from which the unused liquid feed was initially delivered.

12. A method as claimed in claim 7 , comprising closing a supply line isolation valve positioned between the last animal feed stall along the common supply line and a liquid feed source before delivering the liquid feed to the animal feeding stall.