(1) To the extent that funds are available, program funds shall be distributed as follows:

(a) After completing the first year of service under the contract, the veterinarian is eligible to receive up to fifteen thousand dollars;

(b) After completing the second year of service under the contract, the veterinarian is eligible to receive up to fifteen thousand dollars;

(c) After completing the third year of service under the contract, the veterinarian is eligible to receive up to twenty-five thousand dollars; and

(d) After completing the fourth year of service under the contract, the veterinarian is eligible to receive up to twenty-five thousand dollars.

(2) If the veterinarian does not complete an entire year of service or if sufficient funds are not available to provide the full dollar amount of incentive in a year, the amount distributed under this section for that year shall be prorated.