A Tonisity Px trial has been conducted at a 9,000 sow unit which is based in the Western Cape. The group that received Tonisity gained on average 260g at weaning and 365g at post weaning. The mortality rate also decreased from 8.5% to 7.9%. Furthermore, pre-weaning mortality percentage decreased to 7.1%. This means the producer has 6 more piglets per 1,000 piglets to take to market, which translate into a return on investment of R2.41 at pre-weaning and R1.52 at post-weaning for every Rand invested. As a result, weight gain increased, mortality decreased, and the return on investment improved.