Abstract: Background and Objective: Infectious bursal disease (IBD) affects younger chickens and it is a threat for development commercial poultry farms worldwide. The aims of this study are to determine maternal antibody titer and its associate with the age of the parent breeder consequently to estimate the proper age for vaccination. Materials and Methods: Sera samples were collected from 75 parent breeders and 75 of their progeny (3 days old) at monthly interval for three consecutive months and analyzed using Indirect IDXX IBD ELISA kits. Questionnaire was also used to generate information regarding the application of vaccines against IBD. Results: The association between parent and chicks antibody titer were statistically significant (p = 0.00) for both farms and also positively correlated at r = 0.87 and r = 0.58 for Alema and ELFORA, respectively. However, age has no association (p>0.05) with the level of antibody titer in chicken and parent breeder in both farms. Optimum date of vaccination was calculated as15th and 19th day and 14th and 19th day post hatch for ELFORA and Alema farms, respectively. The percentage coefficient of variation (CV%) was greater than 30% which indicates poor uniformity in the antibody titer, therefore, booster vaccination was mandatory. Based on questionnaire survey, 75% of medium scale poultry farms use domestic vaccines whereas the reaming uses imported vaccines. However, 100% of large scale commercial poultry farms relay on imported vaccines from European countries. All farms vaccinated there chickens based on the recommendation of manufacturers i.e., none was based on MDA titer. About 70 and 80% of medium scale and commercial farms had IBD outbreak in the last 3 years, respectively, in which 58.3% thought it was due to vaccine failure. Conclusion: The level of antibody titer in the progeny was associated with antibody titer in the parent breeder. Therefore, proper vaccination to parent breeder and designing proper vaccination schedules based on the MDA should be encouraged.