Abstract #T145

# T145
The effects of fatty acid supplementation and provision of a dry teat on the growth of veal calves.
Larissa L. Deikun*1,2, Greg G. Habing1, James D. Quigley2, Kathryn L. Proudfoot1, 1The Ohio State University, Columbus, OH, 2Provimi, Brookville, OH.

Veal calves face many challenges early in life which can lead to poor growth. Research is needed to determine interventions that promote growth of veal calves. The aim of this study was to determine the effects of fatty acid supplementation (NeoTec5g, Provimi) and the provision of a dry teat on calf growth. A total of 240 Holstein bull calves from 2 cohorts were randomly assigned to 4 treatments using a 2 × 2 factorial design (n = 60/treatment): control (CON), NeoTec5g (N0), NeoTec5g+Teat (NT), and Teat (T0) upon arrival to a commercial veal facility (d 0). Calves were housed in individual pens from 0 to 9 wk and then paired by treatment at wk 9. Milk replacer (MR) was fed twice daily using a proprietary step-up program. NeoTec5g was added to MR at a feeding rate of 0.5g/kg of BW/hd/day for N0 and NT groups. A pelleted calf starter mixed with straw was offered to all calves from d 1. Serum IgG was determined using radial immunodiffusion assays on d 1 to be used as a covariate; 33% of the calves had failure of passive transfer (FPT), defined as < 10 mg of IgG/mL. Body weight (BW) and body condition score (BCS) were recorded at wk 0, 5, and 10. Average daily gain (ADG) was calculated for wk 1 to 5, wk 5 to 10 and wk 1 to 10. BW and BCS were analyzed using repeated measures ANOVAs, ADG was analyzed using a generalized linear model with pair as the experimental unit. There was no effect of NeoTec5g (P = 0.95), or teat (P = 0.30) or their interaction (P = 0.32) on BW. There was no effect of NeoTec5g (P = 0.11) or teat (P = 0.90) or their interaction (P = 0.19) on BCS. There was no effect of NeoTec5g on ADG wk 1 to 5 (P = 0.80), wk 5 to 10 (P = 0.94), or wk 1 to 10 (P = 0.98). There was a tendency for teat to decrease ADG from wk 1 to 5 (P = 0.08), but not from wk 5 to 10 (P = 0.60) or wk 1 to 10 (P = 0.26). There was a tendency for the interaction of NeoTec5g and teat to decrease ADG for wk 1 to 5 (P = 0.096; CON: 0.44 ± 0.2 kg/d, N0: 0.46 ± 0.2 kg/d, NT: 0.40 ± 0.2 kg/d, T0:0.43 ± 0.2 kg/d), but not for wk 5 to10 (P = 0.26) and wk 1 to 10 (P = 0.14). We saw no effect of our interventions on calf growth. Other factors, such as low milk allowance and FPT, may have affected the efficacy of our interventions.